Two-way disk plow



Aug. 11, 1953 H. A. PuRscHE TWO-WAY DISK PLOW Filed June 20, 1949 4 Sheets-Sheet l H022# uescwe,

- INVENToR. BY

@Uvex/EVS' Aug ll, 1953 H. A. PURscHE 2,648,267

TWO-WAY DISK PLOW a?. 1g 'al 'ze 4G ,Hypes/. Ouescf/E 1N V EN TOR.

' @Trae/05515 Aug- 11, 1953 H. A. PuRscl-le, 2,648,267

.TWO-WAY DISK PLOW Filed June 20, 1949 4 Sheets-Sheet M7225/ CZ paescf/E,

1N VEN TOR.

Aug. 11, 1953 H. A. PuRscHE 2,648,267

Two-WAY DIsx PLOW Filed June 20, 1949 4 'Sheets-Sheet- 4 -4 ci?. Heeey ,CZ aesc/fe;

` INVENTOR.

Patented Aug. 11,y 1953 UNITED STATES PATENT OFFICE 17 Claims.

This invention relates to plows, and is particularly directed to a two-Way disk plow construction.

In my prior applications for two-way plows, Serial Nos. 760,846, 780,417, 18,252, 38,352, and 44,338, I have shown and described improved forms of two-way plow constructions which are particularly adapted for use on conventional mold board plows. Each of these devices employs one or more right-hand plowshares and one or more left-hand plowshares. It is well known that certain types of soil may be plowed more readily and efficiently with disk-type plows than with mold board plows.

Accordingly, it is the principal object of the present invention to provide an improved form of two-way plow using ground-engaging disks.

Another object is to provide a two-way disk plow which is particularly adapted for use in conjunction with a tractor provided with draft links of the Ford-Ferguson type.

Another object is to provide a two-way disk plow having a carrier pivotally mounted on a support frame and a pair of ground-engaging disks on the carrier, one in advance and one to the rear of the pivotal connection between the carrier and support frame.

Another object is to provide a two-way disk plow having one or more ground-engaging disks, each of the disks being operative for producing both right-hand and left-hand furrows.

Another object is to provide a two-way disk plow having an inclined carrier mounted for turning movement about a vertical axis, the carrier being provided with spaced ground-engaging disks, the inclination of the carrier serving to compensate for the inclined position of the tractor on which it is carried when the side wheels of the tractor alternately roll in a left-hand furrow and in a right-hand furrow.

Another object is to provide a two-way disk plow having a carrier mounted for pivotal movement about a substantially vertical axis and including a pair of ground-engaging disks, each carried on posts turnably mounted on the carrier. n

appeal ground-engaging disks being shifted to produce a right-hand furrow.

Figure 4 is a plan view taken substantially on the lines 4 4 as shown in Figure 1 and illustrating the ground-engaging disks in one plowing position.

Figure 5 is a view similar to Figure 4 showing the ground-engaging disks in the other plowing position.

Figure 6 is a rear view of the plow assembly and tractor showing the position of the parts when the left-hand tractor wheels roll in the furrow.

Figure 7 is a view similar to Figure 6 showing the position of the parts when the right-hand tractor wheels roll in the furrow.

Figure 8 is a sectional detail partly broken away showing the connection between the vertically extending trunnion and the inclined carrier.

Figure 9 is a sectional plan view taken substantially on the lines 9 9 as shown in Figure 8.

Figure 10 is a sectional elevation taken substantially on the lines IIl-I 0 as shown in Figure 4 and showing the structure for connecting the ground-engaging disks to the carrier.

Figure 11 is a sectional detail partly broken away taken substantially on the lines II-II as shown in Figure 10.

Figure 12 is a sectional detail showinga typical ball joint connection between one of the crank arms and shiftable control element.

Referring to the drawings, the two-way plow assembly generally designated In is adapted to be supported from a conventional tractor II. The tractor may be provided with rearwardly extending draft links I2 and a central compression link I3, The links I2 and I3 may be of the general type known in the art as Ford-Ferguson links. A supporting frame I4 is carried by the links I2 and I3 and may be raised and lowered relative to the tractor by means of hydraulically actuated cranks I5 provided on the tractor. These cranks act through lift rods I6 to raise and lower the links I2. 7

A carrier II -is pivotally supported from the member I4 by means of a rotatable trunnion I8. The lcarrier is provided with support assemblies I9 and 2Il and each of the assemblies carries a rotatable ground-engaging disk 2| and 22. A

lfurrow wheel 23 is also provided on the carrier Il. When the frame I4 and carrier I'I are lowered into plowing position the forward disk 2 I and rear disk 22 engage the soil to turn a furrow. A right-hand furrow is turned when the carrier is vswung so that the disks take the position shown in Figure 5, and a left-hand furrow is turned when the disks take the position shown in Figure 4. Since the wheels on one side of the tractor roll in the furrow when plowing in one direction, and since the wheels on the other side of the tractor roll in the furrow when plowing in the other direction, the carrier I1 is mounted at an angle with respect to the trunnion I8 to compensate for the tilted position of the tractor in each case.

Considering` the construction of the preferred form of my invention in more detail, the support frame I4 includes a central beam 24 extending in the direction of movement of the plow. The beam 24 is connected at its forward end to a cross-beam which in turn is provided with axially aligned and oppositely extending support pins 26. These pins are pivotally engaged by the draft links I2 extending from the tractor II.

An upwardly extending bracket 21 is provided 5 centrally of the frame I4 and is connected to the tractor link |3 by means of an extension piece 28. The extension piece is connected to the link I3 by means of bolts 2S and is pivotally attached to the bracket 21 by means of a Divot pin 30.

A tubular bearing shell 3| is secured to the beam 24 near its rearward end, and this shell is mounted substantially vertically. The trunnion I8 is turnably mounted within this bearing shell 3| as is clearly shown in Figure 8. The upper f end of the trunnion is squared as shown at 32 and is received in a square recess formed in the double-ended control crank 33. The squared end 32 on the trunnion I8 may be received as a press fit within the central recess within the member f- 33, and accordingly, the member 33 prevents the trunnion from dropping downwardly through the bearing shell 3|. Any other suitable means may be provided if desired supporting the trunnion against downward movement. The lower end of 1i the trunnion I8 is provided with an enlarged head 34 which extends beyond the diameter of the bearing shell 3 I. This head 34 is received within a central recess 35 provided in the carrier I1. A

horizontal pivot pin 36 connects the head 34 to the carrier I1. Arcuate slots 31 are provided in the head 34 for reception of friction clamp bolts 38 which extend through the carrier I1 and through the arcuate slots 31. The carrier I1 is mounted at an angle with respect to the substantially vertical axis 39. This angle is adjustable by means of the provision of the slots 31 and clamp bolts 38. The carrier may be further fixed in adjusted position by means of the set screws 4U and lock nuts 4|.

A tubular column 42 is xed by any convenient means such as welding at the forward end of the carrier I1. A post 43 is turnably mounted within this column 42 and carries an angularly positioned bifurcated support 44 at its lower end. The upper end of the post 43 is squared as shown at 45 and is received within a square recess provided in the crank 45. A set screw 41 prevents disassembly of the crank 46 and post 43. A swivel block 48 is mounted between the opposed sides of the bearing support 44 and is pivotally attached thereto by means of clamping bolt 49. The block 48 is provided with an arcuate recess 5G which receives clamping bolt 5I. gaging disk 2| is fixed on the block 48 by means of nut 53. A bearing assembly (not shown) is provided within the housing 54 for rotatably supporting the ground-engaging disk 2| on the stationary axle 52. From the above description it The nonrotary axle 52 of the ground-enwill be understood that the inclination of the axle with respect to the post 43 may be adjusted by swinging the block 48 between the sides of the bearing support 44. The clamping of the block 48 between the sides of the bearing support 44 holds the block in adjusted position, and this action is supplemented by means of the set screw 55 which is mounted on a transverse bar 56 extending between the sides of the bearing support 44.

The ground-engaging disk 22 is carried on the lower end of the post 51, and the mounting of this post and its associated disk is substantially identical to that just described in connection with the post 43 and disk 2|. The crank 5S is secured to the upper end of the post 51 in the same manner as that described in connection with crank 46 and post 43. From this description it will be understood that the ground-engaging disks 2| and 22 may be turned or swiveled about their Supporting posts in order` to change the angle of attack of the disks with respect to the soil.

A double arm 58 is xed to the bearing shell 3|, and the extending ends of this arm are adapted to be connected by means of the links S0 and 5| to the cranks 46 and 58 respectively. Each of the links 50 and 6| is provided with a ball joint assembly 62 at each end. Each of the ball joint assemblies includes a laterally extending pin 63 which may be clamped to the arm 59 or to the cranks 46 or 58. As shown in Figure 12 the ball joint assembly 62 affords means for attaching the end of the link to the crank 46. A slot 64 is provided in the crank 46, and the pin 63 extends through the slot. The pin may be anchored at any point on the slot by means of the nut 65. The crank 58 is similarly slotted at 66, and the ends of the double arm 59 may be slotted as shown at 61 and 68. Since the arm 59 is xed on the bearing shell 3|, it does not turn; movement of the carrier I1 about the axis of the trunnion does not move the arm 59, but such movement of the carrier I1 results in turning of the posts 43 and 51, thereby changing the relative positions of the disks 2 I and 22.

Means are provided for swinging the carrier about the axis of the upright trunnion I8, and as shown in the drawings this means includes the double control arm 33 which is fixed to the upper end of the trunnion as described above. A rst pair of links 69 is connected to one end of the double arm 33, and a second similar pair of links 10 is connected to the other end of the arm. The pair 69 includes links 1| and 12 connected by pivot 13, and the pair 1D includes links 14 and 15 connected by pivot 16. Link 12 is connected to double arm 33 by means of pivot pin 11, and link 15 is connected to double arm 33 by means of pivot pin 18. Link 1| is connected by pivot pin 19 to the stationary element E5 carried on the cross-beam 25. Similarly, link 14 is connected by pivot pin 8| to the member S8. A stop element 82 on the link 12 engages the link 1I to limit the extent of pivotal motion around the pivot 13. Similarly, a stop element 83 is provided on the link 15 which engages the link 14 to limit pivotal motion in one direction about the pivot 16. Thus, the pair of links 69 form a stii-leg or strut as shown in Figure 2, while the pair of links 18 perform the same function in Figure 3. The pair of links 68, therefore, serves to provide a stop or latch to maintain the ground-engaging disks 2| and 22 in position for turning a left-hand furrow, while the links 1U provide a stop or latch for holding the disks in position for turning a right- I hand furrow.

A tension spring 84 is preferably secured to the links 12 and 15, and the action of this spring is to urge both of the links toward stiff-arm posi*- tion. A power cylinder assembly 85 is provided for moving the link pairs 69 and 15 between the positions shown in Figures 2 and 3. This power cylinder assembly includes a hydraulic cylinder 86 having suitable inlet and outlet hydraulic lines 81 and 38 at its opposed ends. These hydraulic lines are flexible and are connected to a hydraulic pump and control assembly on the tractor, not shown. A continuous piston rod 89 extends through lboth ends of the cylinder 85. A piston 90 is reciprocable within the cylinder so that the piston rod 89 may be extended in either direction if desired. A clevis 9| is mounted on one end of the piston rod 89 for engaging the link 1I, and

a similar clevis 92 is mounted on the other end tended so that the links 1I and l2 take an angle e position and the links 14 and 15 assume the stiffleg position. Movement of the piston rod Si?, therefore, acts through the link pairs 69 and 10 to shift the double crank 33 and thereby shift the carrier I1 between the positions shown in Figures 2 and 3.

The adjustments above described between the ends of the links 69 and 6I and the arms 45, 58 and 59 afford means for changing the angular position of the disks 2I and 22 with respect to the position of the carrier I1. Such adjustment is desirable to compensate for wear and consequent reduction of diameter of the disks 2l and 22.

The furrow wheel 23 is carried at the lower end of a bifurcated post S4, and this post is adjustably mounted in the crank arm 95 carried on the pivot pin 95. The axes of the posts d3 and 51, the axis of the trunnion I8, and the axis of the pivot pin 9 are all contained in the same plane. The carrier I1, therefore, may take the form of an elongated beam having a longitudinal axis of symmetry. The pivot pin 95 connects the crank arm 95 to the carrier I1. A set scr-ew 91 may be provided for adjusting the height of the post 94 with respect to the arm 95. A control arm S8 is formed integrally with the arm 9.5 and may be connected by means of link 9S to the stationary arm I0!) xed on the bearing shell 3l. The link 99 serves to maintain the arms 98 and IUI) in parallel relationship and consequently maintains the arm 95 and furrow wheel aligned with the direction of travel of the plow. As shown clearly in Figures 4 and 5 the furrow wheel 23 is on one side of the central trunnion I8 when the disks are turning a left-hand furrow and is on the other side of the trunion I8 when the disks are turning a right-hand furrow. The wheel 23', therefore, is in position to roll in the furrow formed by the disks regardless of whether a righthand or leftehand furrow is being turned. The function of the furrow wheel 23 is to prevent variation in cutting depth of the ground-engaging disks 2I and 22.

vIn operation the tractor is driven to the field with the plow assembly I0 in elevated position as shown in Figure l with the disks 2I and 22 and the furrow wheel clear of the ground level. When the eld to be plowed is reached the operator lowers the draft links I 2 in the usual manner to enable the disks 2I and 22 to enter the ground. The first furrow may be made with the disks in either right-hand or left-hand position. Assuming that a left-hand furrow is formed initially, the power cylinder assembly 85 is actuated so that the carrier is swung to the position shown in Figures 2 and 4. The tractor is then driven from one end of the field to the other, forming a left-hand furrow. The links I2 are then raised to lift the plow assembly Il) out of the ground, the tractor is turned around, and the wheels on the right-hand side of the tractor are driven into the furrow just formed. The power cylinder assembly 85 is then actuated to shift the carrier I1 to the position shown in Figures 3 and 5. The disks 2I and 22 are then lowered into ground-engaging position and the tractor is driven .back across the field, forming a right-hand furrow. The position of the tractor and plow assembly at this point in the cycle of operations is illustrated in Figure 7. |The tractor continues to the end of the furrow, the plow assembly is lifted, the tractor turned around, and the wheels on the left side of the tractor are engaged in the furrow just completed. The carrier is shifted so that the disks 2I and 22 again turn a left-hand furrow. The plow assembly is lowered into the ground and the tractor is driven back across the field. The position of the tractor and plow assembly at this point in the cycle of operations is shown in Figure 6.

It will be observed from consideration of Figures 6 and 7 that the inclined position of the carrier I1 with respect to the trunnion IB compensates for the inclined position of the tractor when the wheels on one side or the other roll in the furrow. The disks 2I and 22 extend for substantially the same distance into the soil when they are in either operative position.

Having fully described my invention, it is to be understood that I do not wish to be limited to the details herein set forth, but my invention is of the full scope of the appended claims.

I claim:

l. In a two-way disk plow, the combination of a carrier, a pair of spaced parallel posts on the carrier, a ground engaging disk rotatably mounted upon the lower portion of each of said posts, means for pivotally supporting the carrier for turning movement about a substantially vertical axis intermediate said posts, means for adjusting the angular inclination of the carrier with respect to said axis, and means for turning each of the posts relative to the carrier.

2. ln a two-way disk plow, the combination of a carrier, a pair of spaced posts on the carrier, a ground engaging disk rotatably mounted upon the lower portion of each of said posts, a support member and cooperating parts for pivotally supporting the carrier on the support member for turning movement about a substantially vertical axis intermediate said posts, :a furrow wheel pivotally mounted with respect to the carrier, the pivotal axis of the furrow wheel, the pivotal axis of the carrier, and the axes of said posts lying in a common plane, and linkage means on the carrier for maintaining the furrow wheel aligned in the direction of travel of the plow.

3. In a two-way disk plow, the combination of a support member, a trunnion turnably mounted on the Support member about a substantially vertical axis, a sloping carrier mounted on the trunnion at an angle thereto, a pair of disk-sulpport-t ing posts turnably mounted on the carrier, a ground-engaging disk rotatably mounted upon the lower portion of each of said posts, means for shitfing the carrier about said substantially vertical axis, and means for turning the posts relative to the carrier.

4. In a two-way disk plow, the combination of a support member, a trunnion turnably mounted on the support member about a substantially vertical axis, a sloping carrier mounted on the trunnion at an angle thereto, a pair of disk-support ing posts turnably mounted on the carrier on opposite sides of said trunnion, a groundengaging disk rotatably mounted upon the lower portion of each of said posts, means for shifting the carrier about said substantially vertical axis, and means for turning the posts relative to the carrier.

5. In a two-way disk plow, the combination of a longitudinal support beam extending in the direction of travel, a trunnion turnably mounted on the rear end of the support beam about a substantially vertical axis, a carrier mounted on the trunnion, a pair of disk-supporting posts turn'- ably mounted on the carrier on lopposite sides of said trunnion, a ground-engaging disk rotatably mounted upon the lower portion oi each of said posts, means above the support :sam for shifting the car ier about said substantially vertical axis, and means below the support beam actuated by the shifting means for turning tbe posts relative to the carrier.

6. In a two-way disk plow, the combination ci. a support member, a trunnion turnably mounted on the support member about a substantially vertical axis, a carrier mounted at an angle on the trunnion, a pair of disk-supporting` posts tur-rf ably mounted on the carrier on opposite sides o said trunnion, a ground-engaging disk rotata mounted upon the lower portion of each or said posts, means for shifting the carrier about said substantially vertical axis, and means for turning the posts relative to the carrier.

7. In a two-way disk plow, the combination oi a support member, a trunnion turnably mounted on the support member about a substantially vertical axis, a carrier adjustably mounted at an angle on the trunnion, a pair of disk-supporting posts turnably mounted on the carrier on opposite sides of said trunnion, a ground-engaging disk rotatably mounted upon the lower portion of each of said posts, means on the support member for shifting the carrier about said substantially vertical axis, and means actuated by tlie shifting means for turning the posts relative to the carrier.

8. In a two-way disk plow, the combination of a longitudinal support beam extending in the direction of travel, a carrier, a pivotal element supporting the carrier on the rear end of the support beam, a pan of disk-supporting posts turnably mounted on the carrier on opposite sides of said pivotal element, a ground-engaging disk rotatably mounted upon the lower portion of each of said posts, means above the support beam for pivoting the carrier about the axis of the pivotal element, and means below the support beam actuated by the pivoting means for turning the posts relative to the carrier.

9. In a two-way plow, the combination of a carrier, a pair of ground-engaging disks, spaced elements on the carrier mounting the disks for rotation relative to said elements, means for pivotally supporting the carrier for turning movement about a substantially vertical axis, power means for shifting the carrier about said vertical axis, said power means including two pairs of links, the links of each pair being pivotally connected, one link of each pair being also connected to a stationary member, the other link of each pair being operatively connected to said carrier, stop means on each pair of links for limiting relative pivotal movement therebetween in one direction, and a power cylinder assembly on the support member selectively engageable with each pair of links.

10. In a two-way plow, the combination of a carrier, a pair of groundengaging disks, spaced elements on the carrier mountingr the disks for rotation relative to said elements, means for pivotally supporting the carrier for turning movement about a substantially vertical axis, said means including a support member pivotally connected to said carrier, a crank fixed relative to the carrier, power means on the support member for shifting the carrier about said vertical axis, said power means including two pairs of links, the links of each pair being pivotally connected, one link of each pair being also connected to the support member, the other link or" each pair being pivotally connected to crank, stop means on each pair of links for limiting` relative pivotal movement therebetween in one direction, and a power cylinder assembly on the support member selectively engageable with cach pair of links.

ll. In a two-way plow, the combination of a carrier, a pair of ground-engaging disks, spaced posts turnably mounted on the carrier, a groundengaging disk carried by each oi said posts, means for pivotally suspending the carrier ior turning movement about a substantially vertical axis, said means including a longitudinally extending beam pivotally connected at its rear end to said carrier, a crank fixed relative to the carrier, power means above the support beam for actuating the crank to shift the carrier about said vertical axis so that the forward end of the carrier may pass under the support beam, and mechanical linkage means below the support beam operatively connecting the posts and said support beam whereby shifting of the carrier relative to the support beam acts to shift the posts relative to the car 'i i 12. In a two-way disk plow, the combination of a carrier, a pair of spaced posts on the carrier, a ground-engaging disk rotatably mounted on the lower portion of each of said posts, a longitudinal support beam extending in the direction of travel, pivot means at the rear end oi said longitudinal beam supporting thc carrier at location between said posts, a furrow wheel. pivotally mounted on the rearmost portion of the carrier, the pivotal axis of the furrow wheel. the pivotal axis of the carrier, and the axes of'said posts lying in a common plane, power aus for swinging the carrier relative o longitudinal beam, and linkage means on the carrier i' or maintaining the furrow wheel aligned with the direction of travel of the plow.

means for adjusting the angular inclination of the carrier with respect to said axis, said pivot means being located on th-e longitudinal axis of the tractor whereby the inclination of the carrier may compensate for the inclination of the plow frame when certain of the tractor wheels roll in a furrow, and thereby equalize the cutting depth of said ground-engaging disks.

14. A two-way disk plow attachable to a wheel tractor having hydraulically elevatable draft links, comprising in combination: a plow frame, means for connecting the plow frame to the draft links, a carrier, pivot means connecting the carrier to the plow frame for oscillatory movement about a substantially vertical axis, power means f-or swinging the carrier about said axis, positive mechanical latch means for holding the carrier in either of two operative positions, ground-engaging disks rotatably mounted on the carrier, means for adjusting the angular inclination of the carrier with respect to said axis, said pivot means being located on the longitudinal axis of the tractor whereby th-e inclination of the carrier may compensate for the inclination of the plow frame when certain of the tractor wheels roll in a furrow, and thereby equalize the cutting depth of said ground-engaging disks.

15. A two-way disk plow attachable to a wheel tractor having hydraulically elevatable draft links, comprising in combination: a plow frame, means for connecting the plow frame to the draft links, a carrier, pivot means connecting the carrier to the plow frame for oscillatory movement about a substantially vertical axis, power means for swinging the carrier about said axis, groundengaging disks rotatably mounted on the carrier, the carrier being mounted at an angle to said axis, said pivot means being located on the longitudinal axis of the tractor whereby the inclination of the carrier may compensate for the inclination Iof the plow frame when certain of the tractor wheels roll in a furrow, and thereby equalize the cutting depth of said ground-engaging disks.

16. A two-way disk plow attachable to a wheel tractor having hydraulically elevatable draft links, comprising in combination: a plow frame, means for connecting the plow frame to the draft links, the plow frame having a support beam extending longitudinally of the tractor and centrally thereof, a carrier, a pair of spaced posts on the carrier, a ground-engaging disk rotatably mounted upon the lower portion of each of said posts, means for pivotally supporting the carrier on the rear end of the longitudinal beam for turning movement about a substantially vertical axis intermediate said posts, the carrier being mounted at an angle to said axis, said pivot means being located on the longitudinal axis of the tractor whereby the inclination of the carrier may compensate for the inclination of the plow frame when certain of the tractor wheels roll in a furrow, and thereby equalize the cutting depth of said ground-engaging disks.

17. A two-way plow attachable to a wheel tractor having elevatable support means, comprising in combination: a plow frame, means for connecting the plow frame to the support means, a carrier, p-ivotalmeans connecting the carrier to the plow frame for oscillatory movement about a substantially vertical axis, power means for swinging the carrier :about said axis, groundengaging too-ls mounted on the carrier, means for adjusting the angular inclination of the carrier with respect to said axis, said pivotal means being located on the longitudinal axis of the tractor whereby the inclination of the carrier may compensate for the inclination of the plow frame when certain of the tractor wheels roll in a furrow, and thereby equalize the operating depth of said ground-engaging tools.

HARRY A. PURSCHE.

References Cited in the le 0f this patent UNITED STATES PATENTS Number Name Date 590,191 Holsclaw Sept. 14, 1897 609,889 Little Aug. 30, 1898 929,070 Young July 27, 1909 940,923 Christensen Nov. 23, 1909 1,760,940 English June 3, 1930 2,041,216 Sjogren May 19, 1936 2,084,629 Coviello June 22, 1937 2,158,746 Dinwiddie May 16, 1939 2,163,832 Coviello June 27, 1939 2,218,885 Kennedy Oct. 22, 1940 FOREIGN PATENTS Number Country Date 18,176 Australia of 1929 103,796 Australia Apr. 22, 1938 

